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Thread: puzzled by this night shot

  1. #1

    Default puzzled by this night shot

    Hi Hi,

    I take a picture last night, using a 50mm f1/6 len on a Nikon D80.

    Please advise any reason why there is reflection of the blue light.


  2. #2

    Default Re: puzzled by this night shot

    It could be ghosting caused by your lens filter. Try taking the same picture without the filter and see if it solves the problem?
    Canon EOS 66 | Kit Lens | Leung Sheung Wing Chun Singapore

  3. #3
    Member
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    Default Re: puzzled by this night shot

    maybe it is the color temp?

  4. #4

    Default Re: puzzled by this night shot

    Quite confirmed that it's ghosting caused by the (UV?) filter.

    Just look at the reflection symmetry which is typical of ghosting : The blue artifact line on the left bottom is exactly the outline of the roof top at the right top area. Likewise, the blue artifact line on the top right side area is exactly the reflection of the outline of the building's roof top at the bottom left. In ghosting, a reflection of bright light source in the picture can be found at the opposite side of the frame.

    Basically, it's a tiny reflection (of bright light source in the picture) that's bounced off from the front glass of the lens, onto the inner side of the (UV?) filter and reflected then back into the lens and onto the sensor.

    Remove your filter to avoid ghosting.
    Last edited by Clockunder; 21st September 2007 at 10:48 AM.

  5. #5

    Default Re: puzzled by this night shot

    Quote Originally Posted by Clockunder View Post
    Quite confirmed that it's ghosting caused by the (UV?) filter.

    Basically, it's a tiny reflection that's bounced off from the front glass of the lens, onto the inner side of the (UV?) filter and reflected then back into the lens and onto the sensor.

    Remove your filter to avoid ghosting.
    I see.. Thanks, reckon I should take a better filter that doesn't have such issue or ??

    please advise.

  6. #6

    Default Re: puzzled by this night shot

    Quote Originally Posted by ongbenghui View Post
    I see.. Thanks, reckon I should take a better filter that doesn't have such issue or ??

    please advise.
    Multi-coated ones are said to reduce greatly the possibility of ghosting /flares etc. and are therefore much more expensive. However, it is not 100% guaranteed to avoid it.

    The easiest and cheapest way to avoid ghosting and flares is to take out the UV filter. That's what I do.

  7. #7
    Member/Tangshooter Redsun's Avatar
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    Default Re: puzzled by this night shot

    Remove your filter
    Its a reflection
    I usually remove my filter when shooting at night

  8. #8

    Default Re: puzzled by this night shot

    A picture speaks a thousand words : Ghosting. Compare it with the original picture, it's clear where the blue artifacts in the original picture came from.

    Last edited by Clockunder; 21st September 2007 at 11:10 AM.

  9. #9

    Default Re: puzzled by this night shot

    Quote Originally Posted by Clockunder View Post
    A picture speaks a thousand words : Ghosting. Compare it with the original picture, it's clear where the blue artifacts in the original picture came from.

    Wow Steady Like that no words also can understand liao
    Canon 30D, G11, 50 f1.8II, 10-22 f3.5-4.5, 24-70 f2.8L, 70-200 f2.8L IS, EX580II

  10. #10

    Default Re: puzzled by this night shot

    Thanks for all the advise. Appreciate it.

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